ABSTRAK Penelitian mengenai analisis kualitas air BOD dan COD di perairan Krueng Cut Desa Alue Naga berdasarkan parameter kimia, fisika dan biologi. Penelitian ini telah dilakukan pada bulan Maret 2017, yang bertujuan untuk mengetahui kualitas air di perairan Krueng Cut Desa Alue Naga. Penentuan titik lokasi penelitian menggunakan metode purposive sampling dan analisis sampel BOD, COD, DO, nitrat, nitrit di Laboratorium Kimia Laut Fakultas Kelautan dan Perikanan Universitas Syiah Kuala menggunakan Spektofotometri Filterfotometer PF-11. Hasil penelitian menunjukkan bahwa konsentrasi BOD tertinggi berada pada stasiun 3 yaitu 5,6 mg/L, dan konsentrasi BOD terendah berada pada stasiun 7 sebesar 2 mg/L. Sedangkan untuk konsentrasi COD tertinggi juga berada pada stasiun 3 yaitu 20,98 mg/L dan konsentrasi COD terendah berada pada stasiun 7 yaitu 10,25 mg/L. Berdasarkan Peraturan Pemerintah No. 82 Tahun 2001 tentang kualitas air baku mutu kelas III, maka kondisi perairan Krueng Cut masih dalam kondisi normal sesuai peruntukannya. Kata Kunci : kualitas perairan, BOD, COD, baku mutu ABSTRACT The study about quality analysis of water BOD and COD in Krueng Cut coastal at Alue Naga village based on chemical, physical and biological parameter. This research was conducted on March 2017, which aims to determine the water quality in the coastal at Krueng Cut Alue Naga Village. The determination of location used purposive sampling methods and sample analysis of BOD, COD, DO, nitrate, nitrite at Marine Chemistry Laboratory Faculty of Marine and Fishery faculty of Syiah Kuala University, used Spectrophotometry Filterfotometer PF-11. The results showed that the highest BOD concentration was at station 3 of 5.6 mg / L, and the lowest BOD concentration was at station 7 of 2 mg / L. The highest COD concentration is also located at station 3 that is 20,98 mg / L and the lowest COD concentration at station 7 that is 10,25 mg / L. Based on Government Regulation no. 82 of 2001 on standard of water quality class III, the condition of Krueng Cut coastal indicated as normal coastal condition. Keywords: water quality, BOD, COD, standard of quality